Question

convert 45 miles per hour into kilometers per minute. Hint 1 mile equals 1.6 km

Answer 1

We need to convert 45 miles per hour to kilometers per minute

So, we should know that :

1 mile = 1.6 km

1 hour = 60 minutes

so,

$\frac{1mile}{1\text{hour}}=\frac{1.6\text{ km}}{60\text{ minutes}}=\frac{2}{75}\text{ km per minutes}$

so, 45 miles per hour = 45 * 2/75 km per minutes = 1.2 km per minutes

$\frac{1.6}{60}=\frac{1.6\cdot10}{60\cdot10}=\frac{16}{600}=\frac{8\cdot2}{8\cdot75}=\frac{2}{75}$